Hi @yuhang ma ,
Welcome to Microsoft Q&A! Thanks for posting the question.
In which region you are trying to deploy GPT-4 model. As mentioned in the documentation, there are limited availability of GPT-4 models in East US, East US 2, France Central region, Australia East, Japan East, UK South and this could be preventing you from deploying a new GPT-4 model.
I suggest you to please use your other GPT-4 model versions and a different region like Canada East, Sweden Central and Switzerland North which is available for GPT-4 model creation.
Sorry for the inconvenience this has caused you.
Please let me know if you have any other questions.
Thanks
Saurabh
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